NDLI: Complex fluids affect low-Reynolds number locomotion in a kinematic-dependent manner

Content Provider	Springer Nature Link
Author	Godínez, Francisco A. Koens, Lyndon Montenegro Johnson, Thomas D. Zenit, Roberto Lauga, Eric
Copyright Year	2015
Abstract	In order to improve our understanding of the self-propulsion of swimming microorganisms in viscoelastic fluids, we study experimentally the locomotion of three artificial macro-scale swimmers in Newtonian and synthetic Boger fluids. Each swimmer is made of a rigid head and a tail whose dynamics leads to viscous propulsion. By considering three different kinematics of the tail (helical rigid, planar flexible, and helical flexible) in the same fluid, we demonstrate experimentally that the impact of viscoelasticity on the locomotion speed of the swimmers depends crucially on the kinematics of the tails. Specifically, rigid helical swimmers see no change in their swimming speed, swimmers with planar rod-like flexible tails always swim faster, while those with flexible ribbon-like tails undergoing helical deformation go systematically slower. Our study points to a subtle interplay between tail deformation, actuation, and viscoelastic stresses, and is relevant to the three-dimensional dynamics of flagellated cells in non-Newtonian fluids.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	56
Issue Number	5
e-ISSN	14321114
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Fluid Dynamics Fluid- and Aerodynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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